21035379 has 8 divisors (see below), whose sum is σ = 28148112. Its totient is φ = 13973120.

The previous prime is 21035359. The next prime is 21035389. The reversal of 21035379 is 97353012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21035379 - 2⁸ = 21035123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21035359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11634 + ... + 13319.

It is an arithmetic number, because the mean of its divisors is an integer number (3518514).

Almost surely, 2^21035379 is an apocalyptic number.

21035379 is a deficient number, since it is larger than the sum of its proper divisors (7112733).

21035379 is a wasteful number, since it uses less digits than its factorization.

21035379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25237.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 21035379 is about 4586.4342358743. The cubic root of 21035379 is about 276.0472640124.

The spelling of 21035379 in words is "twenty-one million, thirty-five thousand, three hundred seventy-nine".